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Another look at AMD's new Athlon under Linux:
The XP, based on the Palomino core, adds hardware prefetch, which enables the processor to attempt to figure out what data it will need next, and grab it from memory, so the data is already waiting in the chip's faster cache memory. It also adds 3Dnow! Professional and SSE support. SSE is Intel's SIMD instruction set, which is supported by many applications. By including these instructions and setting the bit that identifies the Athlon XP as an SSE capable processor, AMD has enabled the Athlon XP to better run software optimized for SSE.
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